和硫

In chapter three, the activating agents of ytterbium have been examined. Barbier-type reaction promoted by ytterbium metal was examined. The experimental results shown that the yield of Barbier reaction of imines with allylic bromide promoted by ytterbium is higher than that of aldehydes and ketones with allylic bromide under the same reaction conditions. In this chapter, the reductive cleavage of Se-Se and S-S bond induced by ytterbium metal was also studied.

首先研究了金属镱的活化剂以及活化方法，接着考察了金属镱促进的Barbier反应及其在合成高烯丙基胺和高烯丙基醇中的应用，以及影响该反应的主要因素；究了金属镱促进的二硫醚和二硒醚的S—S键和Se—Se键的还原断裂，继而与氯代烃，胺基甲酰氯反应生成相应的硫醚，硒醚，胺基甲酸硫代酯和硒代酯。

The present invention relates to the depolymering cyclization reaction of aromatic dithio ether polymer to prepare aromatic cyclic dithio ether compound under the presence of mercapto group containing compound and alkali matter.

本发明涉及利用芳香双硫醚聚合物的解聚成环反应来制备芳香双硫醚环状化合物的方法。该方法采用芳香双硫醚聚合物在含巯基的化合物和碱性物质存在的条件下发生解聚成环反应生成双硫醚环状化合物。

Vulcanization thing in sulphur natural gas, take off to exclude, Make organic sulfur content and the vulcanization hydrogen of the natural gas of raw material accord with relevant technical index requirement , satisfy production needs,Today of the chemical swift development of natural gas the desulphurization method of natural gas also emerge endlessly , In traditional a ethanol amine the foundation of wet desulphurization and the dry law desulphurization of zinc oxide on, have arisen the desulphurization of normal temperature of ferric oxide, the dry law desulphurization of activated carbon and member sift desulphurization, DDS biochemical wet desulphurization wait for new technology .

硫的存在造成合成氨工艺中催化剂中毒，因此需将含硫天然气中的硫化氢、有机硫等硫化物脱除，使产品天然气的硫化氢和有机硫含量符合有关技术指标要求，满足生产需要。在天然气化工迅猛发展的今天，天然气脱硫方法也层出不穷。在传统一已醇胺湿法脱硫，氧化锌干法脱硫的基础上，出现了常温氧化铁脱硫，活性炭干法脱硫，分子筛脱硫，DDS生化湿法脱硫等新技术。

The iron pyrites formation and the curing product's oxidation caused the oil quality combustion principle to the storage tank to carry on the theoretical analysis, the temperature tendency change rule and the influence iron pyrites oxidation tendentious factor carried on the system and the thorough experimental study to the iron pyrites oxidation process, in the union petroleum processing and the storage and transport process actual situation carries on the analysis and the discussion to the oxidation rate influencing factor, under the plan dissimilar condition the curing product oxidation heating curve.

对储罐中硫铁化物的形成和硫化产物的氧化引起油品燃烧的原理进行了理论分析，对硫铁化物氧化过程中温度的动态变化规律和影响硫铁化物氧化倾向性的因素进行系统而又深入的实验研究，结合石油加工和储运过程中的实际情况对氧化速度影响因素进行分析和讨论，绘制不同条件下硫化产物氧化升温曲线。

The load carrying capacity and antiwear property of S,P containing benzotriazole derivative (BM 3) were evaluated using a four ball test machine,and compared with those of zinc salt di(T 202 ) and amine salt of complex ester thiophosphate (T 307 ). The antiwear mechanism of BM 3 were studied by investigating the chemical states and the mass fraction of elements on the rubbed surfaces using X ray photoelectron spectroscopy and electron probe microanalysis and the thermal decomposition products using gas chromatography mass spectrograph.

在四球机上对照评价了含硫、磷苯并三氮唑衍生物（BM－3）和二丁辛基二硫代磷酸锌（T202）及硫磷酸复酯胺盐（T307）的承载能力和抗磨性能，用X射线光电子能谱仪和电子探针微分析仪等对磨斑表面元素N，S和P的存在形式及表面膜的组成进行了分析，用气相色谱－质谱联用仪对BM－3的热分解产物进行了分析，并且还对其极压抗磨作用机理作了探讨。

Process of flotation of acture ore is the following: firstly, adding Na_2CO_3, ZnSO_4, CSU-1 to the pulp while grinding, and thus in this condition of low Eh, marmatite is inhibited; Secondly, adding CSU-1 to the pulp out of grinding machine, then amesonite and iron sulfur mineral can be flotated using diethyldithiocarbamate as collector; High quality lead and antimony concentrate can be got by adding CSU-1 and calcareousness; Lastly, marmatite is flotated by adding calcareousness, CuSO_4, xanthe, and D-250 to get zinc concentrate.

小型试验研究表明，首先在脱硫粗选作业只加入适量的Na_2CO_3、ZnSOO_4、和CSU-1至磨矿机，利用磨矿机的研磨和磨机中的低电位环境，使铁闪锌矿受到抑制，而最容易浮的脆硫锑铅矿和黄铁矿、磁黄铁矿等硫化矿物则依然具有可浮性；在磨机出来的矿浆中分别加入CSU-1进一步抑制易浮的铁闪锌矿，然后加入乙硫氮将脆硫锑铅矿和硫化铁矿快速浮净，加入石灰和CSU-1，浮选分离出高质量的铅锑精矿；接着添加石灰、CuSO_4、黄药及2~#油选别铁闪锌矿。

Second, residues in the reactive site of the inhibitor were replaced by the consensus substrate recognition sequence of furin, namely, Arg at P_1, Lys at P_2, Arg at P_4 and Arg at P_6. In addition, the P_7 residue Asp was substituted with Ala to avoid possible electrostatic interference with furin inhibition. Finally, the extra N and C terminal residues beyond the doubly conjugated disulfide loops were further truncated. However, all resultant synthetic peptides were found to be temporary inhibitors of furin and kexin during a prolonged incubation, with the scissile peptide bond between P1 and P'1 cleaved to different extents by the enzymes.

高活性、低分子量的furin酶抑制剂有可能发展成为新型的抗细菌内毒素和抗病毒感染的药物，我们以绿豆胰蛋白酶抑制剂Lys片段长链22肽为模板，设计了一系列能抑制furin和kexin活性的突变体，采用如下三种方法逐步优化：一、去除Lys片段长链三对二硫键中的一对，用Ser替换Cys，减少可能存在的二硫键错误配对；二、抑制剂的活性中心根据furin底物的专一性逐步改变，即P1、P2、P4和P6位分别变为Arg、Lys、Arg和Arg，同时为了避免P7 Asp和P6 Arg之间可能存在的相互作用，将P7位Asp替换为Ala；三、将两对二硫键形成的双环的外面5个氨基酸残基去除。

Catalytic techniques for deep desulfurization, denitrogenation and dearomatization in production of clean gasoline and diesel fuels were reviewed, especially those for producing low-sulfur and extra-low-sulfur gasoline and diesel oil, among which technologies arousing most attention are sulfur-reducing FCC catalyst and additives, selective hydrogenation catalysts and technology, adsorptive desul-f urization of gasoline and diesel oil, biologically catalytic desulf urization of diesel oil, and selective oxid...

为面对新世纪清洁燃料生产的新机遇和新挑战，各种生产清洁燃料的催化技术正在竞相开发之中，尤其是生产低硫、超低硫汽油与柴油技术。其中，催化裂化降硫催化剂和助剂、选择性加氢处理新催化剂及工艺、汽柴油吸附脱硫、柴油生物催化脱硫和选择性氧化脱硫等新技术尤其引人注目。我国应加快清洁燃料生产催化新技术的开发研究，为生产更清洁的汽油和柴油燃料提供技术储备。

Meanwhile,atmospheric exposure test and electrolyte soaking method were applied to investigate the effect of different rare earth catalyzers and their content on corrosion resistance of sulfurized Cr12 steel.

借助稀土的催渗作用实现了Cr12钢表面的低温熔融渗硫，用扫描电镜和俄歇电子能谱仪分析了渗硫层的微观形貌和基本成分，并通过大气暴露试验和电解质浸泡试验考察了渗剂中稀土添加剂的类别和加入量对渗硫层抗蚀性的影响规律。

Basing on experimental study, the article analyses the process of calcination and desulfuration reaction and builds a mathematical model of calcium-based materials (limestone, shell and their mixture), which will provide theoretical basis and practical guidance for improved performance of the normal sulfur sorbent and the choice of new sulfur sorbent.

然而传统的燃煤固硫剂石灰石，因钙转化率低而使该技术的推广应用受到限制，在实验研究的基础上，对钙基材料—石灰石和贝壳用于燃煤的煅烧固硫反应过程进行数学建模与分析，以便为改善常规固硫剂的性能，选择新型固硫剂提供理论依据和实用指导。

Plunder melds and run with this jewel!

掠夺melds和运行与此宝石！

My dream is to be a crazy growing tree and extend at the edge between the city and the forest.

此刻，也许正是在通往天国的路上，我体验着这白色的晕旋。